# std::match_results<BidirIt,Alloc>::max_size

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< cpp‎ | regex‎ | match results

size_type max_size() const noexcept; |  | (since C++11)

Returns the maximum number of submatches the `match_results` type is able to hold due to system or library implementation limitations, i.e. std::distance(begin(), end()) for the largest number of submatches.

### Parameters

(none)

### Return value

Maximum number of submatches.

### Complexity

Constant.

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